Drying apparatus for tenter frames and the like



Nam 25, 1924.-

C. J. MERRILL DRYING APPARATUS FOR TENTER FRAMES AND THE LIKE Filed June 25, 1922 61.6 5) (Arie I-Mernll.

Patented Nov. 25, 1924.

CABLE J. MERRILL, OF PORTLAND, MAENE.

DRYING APPARATUS FOR TENTER FRATILES iQtND THE LIKE.

Application filed. June 26, 1922. Serial No. 571,122.

To all whom it may concern: I

Be it known thatL'CARLn J. MnRRrLL,-a citizen of the United States, residing at Portland, in the county of Cumberland and State of Maine, have invented certain new and useful Improvements in Drying Apparatus for Tenter Frames and the like, of which the following is a specification.

My invention relates to tenter frames and the like and its object is to secure a more uniform drying of the cloth.

The invention may be used under some circumstances for drying paper.

As these tenter frames have always been arranged, the air flues have extended along the sides of the frame with air nozzles which were directed downwardly against the edges of the cloth and inwardly toward the center.

As a result of this arrangement, the fabric dried unevenly and especially the edges dried more slowly than the body of the cloth because the air being blown from the side toward the center did not have its full effect on the edges of the fabric and the edges escaped from the drying action of the air.

According to my arrangement, I deliver my air from on top at the center of the cloth or other fabric by the use of a nozzle which spreads the air laterally and longitudinally and in a somewhat downwardly direction so that the effect is evenly distributed over the whole area.

Pains are taken in arranging the nozzles so that successive nozzles will not take effect on the same portion of the cloth or in the same line as the cloth is fed along.

By this arrangement, the air fines are kept out of the way overhead and do not interfere in any manner with the gripping devices attached to the edges of the cloth and the latter can be freely handled without regard to the drying ducts.

1 illustrate my invention by means of the accompanying drawing in which Fig. 1 is a plan,

Fig. 2 is a side elevation,

Fig. 3 is an end elevation of the tenter frame showing sections through the walls of the room in each case,

Fig. 4: is a section on the line 1-1 of Fig. 5,

Fig. 5 is a half section and half elevation on the line 22 of Fig. 6 and,

Fig. 6 is a plan of the air nozzle.

Referring to the drawing 1, 1, indicates the walls "of the dry-room, 2 is the main hot air supply pipe, are the "air pipes or flues for supplying air to the nozzles and extending longitudinally above the'cl'oth 4, and 5 is the tenter frame.

Extending longitudinally over the center of the cloth and adjacent to the surface thereof are series of nozzles indicated generally as 21, extending downward from the pipe or flue 3.

Each nozzle takes its air supply from the flue 3 and the several nozzles are positioned preferably at difierent levels so that the air currents coming from adjacent nozzles will not strike at the same line on the cloth but they are so arranged that they will strike at different points on the surface of the cloth and thus tend to dry the latter uniforml Each one of the nozzles is formed with a deflecting base having outwardly and laterally inclined sides 11 and a longitudinally inclined end 12 whereby the air is deflected laterally and longitudinally and at the same time downwardly so as to impinge on the cloth 4: at an angle. From the lower edges of the inclined sides 11 and 12 of the base are extended wings 14 slightly inclining downwardly. The series of nozzles being in substantially the center of the cloth tends to drive the air from the center outward so that the drying effect will be substantially the same at the two edges as it will be in the center of the cloth.

The descending air is confined. by parallel confining walls 13 which are spaced apart from the inclined surfaces 11 and 12 0f the base and at the foot of the inclined surface Walls 13 is an approximately horizontal extension 15 which tends to spread the air horizontally and slightly downwardly and to hold it in contact with the wings 1 1.

The rear portion of the nozzle is entirely closed by a diaphragm 19 which extends from top to bottom and a vertical wall 16 connects with the inclined walls 13.

Thus, the descending air striking the surface of the deflecting base is projected laterally and longitudinally in a slightly downward direction, spreading it out over the surface of the cloth from the median outward.

The main current of the nozzles may be directed forwardly or the same direction in which the cloth is moving or it may be in the contrary direction as there is not very much diflerence in the effect whichever way the current is directed.

I claim 1. A drying system for tenter frames consisting of a series of air nozzles arranged centrally above the drying fabric and at unequal distances above said fabric, each of said nozzles being formed to discharge air longitudinally, laterally and downwardly toward the opposing edges of the fabric and a longitudinal supply pipe for supplying air to said nozzles.

2. The herein described nozzle for tenter frames consisting of a deflecting base having laterally and longitudinally inclined deflecting. surfaces, substantially horizontal extensions for the lower ends of said surfaces, parallel upper walls spaced above said surfaces, a vertical flue opening centrally through said parallel walls, with a rear diaphragm for closing the entire rear portion of said nozzle whereby the air is deflected laterally longitudinallyand downwardly.

CABLE J. MERRILL. 

